6y-3x-10= 0
6y = 3x-10
y =1/2x - 5/3 . tegak lurus : m1 × m2 = -1 = 1/2 × -2 = -1 , jadi m2 = -2 . gradien = -2 .
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6x -10 = 3y
3y = 6x -10
y = 6/3x -10/3
y = 2x -10/3
maka, m₁ = 2
m₁ . m₂ = -1
2 . m₂ = -1
m₂ = -1/2
y -y₁ = m(x -x₁)
y -5 = -1/2(x -(-3))
y -5 = -1/2x -3/2 dikali 2 untuk menghilangkan penyebut, sehingga
2y -10 = -x -3
2y = -x -3 +10
2y = -x +7
x +2y -7 = 0
6y-3x-10= 0
6y = 3x-10
y =1/2x - 5/3 . tegak lurus : m1 × m2 = -1 = 1/2 × -2 = -1 , jadi m2 = -2 . gradien = -2 .